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A signal that looks very complex in the time domain behaves quite differently in the frequency domain. Time domain measurements show an impure sine wave. Without frequency domain measurements, it is still impossible to know the source and frequency of the second harmonic. Spectral analysis can show the spectral components individually, thus revealing the source of the interference. While the information provided by the time domain (such as the rise and fall times of signal pulses) is important, the frequency domain allows you to determine the harmonic content of the signal, such as out-of-band emissions and distortion. For more information, read this blog post:Spectrum Analysis Basics Part 1 - What is a Spectrum Analyzer?
You can build a DC power supply by converting AC to DC using an AC-DC converter or rectifier, and then using a voltage regulator to maintain a stable output voltage. The basic steps for constructing a DC power supply are as follows: Please note that constructing a power supply requires familiarity with electronic and electrical safety. It is best to consult a professional or use a pre-built kit to avoid danger. ,
View Full VersionAn AC power supply is responsible for providing AC power to the load. The power input can be either AC or DC. You need an AC power supply because the power from the wall outlet does not meet the specifications of the load. In order for the load to operate properly, you need to transform the AC power supply to tune the AC power from the supply to the voltage, current, and frequency required by the device. This can be done by boosting...
View Full VersionIn this article, we will describe the basic measurements of an impedance analyzer. Overview An impedance tester is an instrument used to measure AC resistance or impedance. This article will introduce the basic knowledge about impedance, the measurement method of impedance, and how to use the impedance tester. What is impedance? What is impedance? In short, it is "a quantity that indicates the difficulty of the flow of alternating current". ...
View Full VersionAll modern oscilloscopes are digital storage oscilloscopes (DSOs) that use digital signal processing to capture and display analog signals. If the oscilloscope has the ability to observe these signals simultaneously in the digital domain, it is a mixed-signal oscilloscope (MSO). If the oscilloscope has a built-in spectrum analyzer function, it is a mixed-domain oscilloscope (MDO), although this term is less common. ,,...
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